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Патент USA US2056400

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oct. s, 1936. ,
F. Q_ HOLTZ .
'
y
2,056,400
TIME swITcH
Filed Feb. 6, 1933
3 Sheets-Sheet l
25. ,f
82.
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Oct. ‘ 6, 1936.
2,056,400
vF. c. HOL-rz
TIME SWITCH
»Filed Feb. e, 195s
3 Sheets-Sheet 2
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f'îedën'df ÚÍÍO ZZ'Z.
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Oct. -6, 1936.
F_ C, HOL-r2
2,056,400
TIME SWITCH
Filed Feb. 6,V 1953
3 Sheets-Sheet 3
Patented Oct. 6, 1936
~ 2,056,400
UNITED STATES PATENT OFFICE
y
z,0ss,40o
'man swrron
Frederick C. Bolts, Springfield, Ill., assignor to
Sangamo Electric Company, Springñeid, Iii., a
corporation oi' Illinois
Application February 6, 1933, Serial No. 655,355
23 Claims. (Cl. 20D-39)
'I'he present invention relates to time switches. ond tripping operation respond to relatively small
In one embodiment oi my invention herein
shown, the device is particularly adapted to func
tion as an electric range timer for automatically
s turning on the heating element of an electric
range at any selected time and for automatically
turning oi! this heating element at a later se
lected time; ‘and in another embodiment of my
invention herein shown, the vdevice is particular
l0 ly adapted to function as an interval timerfor
,
opening or otherwise controlling a particular cir
cuit yat the expiration of a definite time interval,
which time interval can be accurately predeter
mined based on comparatively short umts of
vlli time. While the above embodiments are the
preferred constructions ‘and uses of my inven
tion, nevertheless it will'be understood that my
invention is not limited thereto but can also
be embodied in other constructions and used for
go other purposes.
subdivisionsof time.
Another object of the invention is to provide
an improved arrangement whereby the switch
contacts can be manually tripped into closed po- 5
sition in the event that the meer should desire
to control the circuit by a manual switch at some ‘
other point. In the preferred embodiments here
in shown, this manual tripping' of the switch
contacts to closed position is enacted by a third l0
stage of return movement of ìsaid control mem
ber, this third tripping operation being effected
manually.
1
_
A
Another object of the invention is to provide
an improved time switch of the abovegeneral l5
description wherein the time tripping functions
can be quickly and easily adjusted to different
time intervals from the exterior of the device,
and wherein the switch can be> quickly and eas
ily, tripped in the manual tripping operation, so 20'
The actuation o_f Àthe switch contacts is gov-A that the housewife or'other user can perform
yerned by a control member which is initially
c
moved in one direction into a set position by
manual operation. _ Spring means normally
these operations without complication or incon
venience.
_
__
Another object of the invention is to provide
an improved construction and arrangement of 25
>the two time controlled tripping devices and
their associated timeresponsiv'e driving mem
bers, relatively to which the tripping devices can
tacts at the selected predetermined time or'times. » be given different time settings.
Other objects and advantages of the invention s0
30 This return movement is `governed by time con
g description of two
trolled'tripping or releasing devices which can will appear from the foll
25 tends to move this control member in the op
posite direction, back to a normal position. It
is this spring actuated return movement of said
control member which actuates the switch con
be given any desired time setting.
_
One of the objects of the invention is to pro
v vide an improved construction of time switch'
35 wherein this return motion of said control mem
ber occurs in two stages or steps. Assuming the
control member to have been manually moved
into its set position. the nrst tripping step oc
curs at the end of a predetermined time interval
40 and allows the control member to move back' part
way through its return motion. It is held at this
point until the expiration of a second'time in
terval, whereupon the second tripping or releas
ling device permits said control member to move
45 back through asecond stage of its return move
ment. In the, electric range timer embodiment
of my invention. this two-step operation is uti
liaed to predetermine the times when _the switch
goes into the l‘On” position and goes into the
60 "08” position; and in the interval timer em
bodiment of my invention this two-step opera
tion is? advantageously utilized by having the
first tripping operation respond to relatively
u large divisions of time and by having th'e sec
preferred embodiments o my invention. In the
accompanying drawings
trating such embod
iments-f
`
'_
Figure 1 is a front elevational view of the 35
range timer embodiment of my invention;
'
Figure 2 is a rear elevational view of thel same,
with portions broken away;
'
Figure 3 is a sectional view on an enlarged
scale, taken approximately on the plane of the 40
line S-I of Figure 1;
.
_Figure 4 is a fragmentary perspective view,- with
portions broken away;
_
_'
Figure 5 is a detail _view of the control arm.
illustrating the pivcœd mounting of me latch 45
thereon;
.
’
Figures 6, '1, 8 and 9 are diagrams illustrating
successive positions of the switch control member
and the relations of the switch contacts in each 5o
of these positions of said control member;
Figure 1_0 is a front elevational view of the in
terval timer embodiment of my inventiom'
Figure l1 is a iront view- with the lower por
tion of the casing or supporting frame broken u
2
accesso
away to illustrate the gear train, tripping parts,
etc.: and
enlarged scale, looking upwardly as indicated
be extended Ato e. terminal post, er posts.l de,
mounted on the rear insulating'panel dl.
The cam d5 is oscillated into its diñferent posh
tlons by a switch control member designated di
by the line iä-IZ of Figure 11.
The main frame structure of the device com=prises front and rear frame plates it and is
in its entirety. This control member comprises a
shait dla, an oscillating arm dit iinedly secured
to said shaft, a latch die pivotally mounted on
Figure 12 is a horizontal sectional view on an
which are fastened in spaced relation by corner. the outer end or said arm, and an actuating knob .
spacing 'posts 2l. A face plate 22 is mounted did on the front end or the shaft die. The cam
in spaced relation to the front frame plate it by' d5 is ?lxedly secured to the rear end. of said shaft.
screws 2t which thread into spacing pests 2d rig
idly secured to the front frame plate lo. All of
the visible indicating parts are associated with
this i’ace plate 22, including the clock dial 25, clock
rc hands 2li, and the other dials and pointers associ=ated with the tripping apparatus to be later dem`
scribed. A ñnishing bead El extends around the
marginal portions oi’ the face plate 2t, and when '
>the device is assembled in a casing or is built
into an electric range, the enclosing wall extends
to this finishing bead 2l.
'
The shaft has suitable bearing support in the
iront and rear frame plates id, i9, for rotative
movement and for axial sliding movement. A
target or indicating disc et is secured fast to the
shaft 5ta, the front face of said disc bearing the
successive indicia: “Set”, “On”, À“Oiî”; followed
by a red target area designated 53. In the oscil
lation of the shaft 5ta these are presented suc
cessively in a sight Window 5d provided 'in the
20
lower portion of the face plate 22.
The arm lith is secured to the shaft Eta at a -
’
The clock 25, 2t may be of the spring=-wound
point between the two frame plates I8 and it. Re
ferring to Figures d and 5, said arm has a spool
shaped huh- portion äl' which is rigidly secured
to the shalt Sie, as by pinning or in any other
suitable manner, whereby the arm oscillates with
the shaft and also moves bodily with the shaft
type, electric motor driven type, or ci the sec
ondary type, receivingimpulses from a master
clock or other control source. In the embodi
ment disclosed, I have illustrated a motor driven
type of clock, comprising a self-starting synchro
nous motor 8l, particularly for installations . in the amai shitting movement of the latter. A
coil spring 5d is conñned around the shaft be=
where alternatingA current is available. This mo
tor ti may be mounted on thebaclr side of the tween the hub 5l and the back plate' iii. The
rear frame plate it, as shown in'mgure 2. The iront end oi’ said spring is extended outwardly
driving train from the electric motor to the clock and provided with a hooked extremity 58' which
hands, and such other details oi’ the cloch-move= hooks over the side edge oi the arm dit. The
ment, have not been illustrated because the same other end 5d" ci’ said spring bears against the
35 are old and well known. .A second hand 26’ ' iFlg=
ure 1) or a second disc 2t", (Figure lil) is pret=
erably provided to indicate whether or not the
cloclr is operating. ' In the range timer embodi»
ment illustrated in Figures l-Ji, a gear 532 transe
mits thrncdv motion from the clock movement to
'fthe tripping parts associated with the switch
control member, which tripping parts will be later
described.
-
„
Referring now to the arrangement of the switch
contacts, as illustrated in Figures 2 and él, the
stationary and movable contacts 33 and-dii, re“n
spectively, are mounted on ila-shaped bars 35 and
The latter are secured to the outer sides or
spaced terminal blocks 3l and 3S composed of
insulation, these terminal blocks being secured
to an insulating panel 39 which is secured to the
bach side of the rear frame plate it.
The L-= `
shaped supporting bar 35 for the contact 8d holds
_said contact in substantially stationary relation,
while the L-shaped supporting bar 3o for. the
bottom contact til can be forced or sprung down
stop pin E@ projecting forwardly from the' back 35
plate itl. Said spring acts as a torsion spring,
normally tending to swing the switch control
assembly die, Elib, in a counterclockwise direc
tion (as viewed from the iront of the device).
and it also serves as a compression spring re-= 40
acting against the baclr plate i9 and tending to
thrust the control assembly forwardly.
The latch or dog die is pivotally mounted for
sidewise swinging movement on the outer end oi
arm Eäib, oscillating about a pivot stud or'screw
di which is secured to the arm. The normal
position of said latch or dog is with the outer
beveled nose portion Sie extending outwardly sub- ,
stantially in prolongation of the arm Sib. .es in-a
dicated by the dotted line position in Figure 5,
said latch can swing in one direction relatively to
this normal position, such swinging motion being
against L the pressure ci a coil spring @2. The
outer end oi said spring passes through an aper=
tured lug @if on the dog and the other end oi’ the 55
spring is hoolredover the side oi the arm till», the
intermediate convolutions of the spring being
coiled about the forwardly projecting portion oi’
the hub 5l. A stop shoulder dlg projects backn
wardly forseparating the contacts. .el copper
conducting strip il@ aids in carrying current to
@ai the movable contact, and a reenforcing bar ¿33 .wardly from the opposite edge of the dog for 60
prevents flexing of the horizontal leg portion ci. engaging the baci: edge of the arm cib, this stop
supporting member 36. .ii/strip of insulationl ¿lil preventing swinging motion of the dog in the
is secured to the top side of this horizontal leg, oppositedirection from its normal position, and
and the cam ¿35, which actuates the switch, is the action or? the spring 62 being such as to nor=
i adapted to contact with this strip of insulation. molly hold this stop shoulderagainst the arm cib.
titiV
The conductors of the circuit to be controlled are
Figures 6,- ?,78 and 9 diagrammatically illus@
adapted to be connected to the terminal screws trate how the switch control member @l con
d@ threading into the terminal blocks tl, sa. A operates with three' tripping or releasing members
rear insulating panel #il is suitably secured to t5, @d and @l which are grouped substantially
the back sides oi’ said terminal blocks, for en
concentrically about the rotative axis of the con»
closing the rear portion oi the switch structure. trol member 5i.' The tripping members t5 and et
The conductors fit of the electric motor di may are time responsive; in the preferred construe»
be connected to the terminal screws de, or, ‘wherev tion illustrated, they consist of rotating shafts
independentV circuit connections for said motor are which have geared connection with the clock.
desired, these conductors, or one of them, may Cut in said shafts are notches tta and Soc, respec»
.
3
2,056,400
only. ' 'mess m. man» ìt «ad n mais is the
lib between said frame plates. Mounted on said
counterclockwise direction indicated, and when _ shafts, and rotatable with respect thereto, are
. lthe bottom'of. the- notch in one of these shafts two spur gears ‘Il and 12. These two gears both
arrives at a position substantially tangent to the
arc A, the shaft releases the control member il.
The arc A defines the path of movement of the
outer extremity of the dog llc. It- will be seen
from the foregoing that when the shafts Il and t8
are in any rotated positions other than with-their
10 _notches Ila and “a substantially tangent to the
mesh with the aforementioned gear I! which is
disposed on the front side of the front frame plate
I8. The gear 32 is operatively connected through
suitable gearing with the clock movement and,
hence, the two spur gears 1i and 12 are both
driven continuously at a time controlled speed.
~ Said gears 1| and 12 function as time responsive 10
arc A, the control member li can be latched be- _ driving members for driving the shafts 0l and Il,
hind these shafts, with the dog lic engaginga
solid part of the shaft. Figure 6 illustrates the
The driving connection between each of these
gears and its respective shaft is a friction slip
set position of the control member to which it is page connection, being identical in the case of
moved manually in a clockwise direction, and as ` both shafts. Referring to Figure 3, the shaft Il 15
the control member passes each- ofthe tripping is formed with a reduced bearing portion, Athe
, members l5. ll and l'l in being swung to this set front edge of which defines a shoulder “b pro
position, the dog lic oscillates on its'pivot screw jecting from the ront frame plate I8. A fric
li in passing each of the tripping members. tion spring lâ, in ‘the form of a cupped washer or
20 >When the control member is in the position illus
spider, is confined >between said shoulder “b and
trated in Figure 6,» with the dog die engaging a
he. adjacent side of the ge'ar 1i. This spring is
solid part of the shaft Il, the coil spring I8 is maintained under continuous pressure so that it
tending to swing said control member back functions to transmit a drive from gear 1i to
through its return movement in a counterclock
shaft Q8 by friction. The shaft 85 is formed with
wise direction. Therefore, as soon as thenotch a reduced extension Btc projecting forwardly
“o rotates to a position of tangency, the control from the shoulder 55h, and the companion shaft
member il is tripped or released and allowed to lt is formed with alike reduced extension. Each
swing to the position illustrated in Figure 7. where of the two gears 1i and 12 has a sleeve 14 rigidly
the dog engages a solid part of the shaft ß. As secured to its respective gear and rotatably'
soon as the notch “a of this shaft arrives in a mounted on this shaft extension. Secured fast 3°
position of tangency. the control element is again to the outer-end of the sleeve associated with the
tripped or released and allowed to continus gear li is a rotating dial or disc 18, and secured
through a second step of return movement, until to the sleeve associated with the other gear 12
is a like rotating dial _11. As shown in Figure l,
the dog strikes the third tripping member l1.
35
these two dials rotate in circular _apertures cut in
The tripping release between the control mem
ber andl this third stop l1 is preferably effected the face plate 25, and marked on the faces of
by relative endwise movement between the control said dials is suitable time indicia 10', 11'. In a
l member land said stop member. In the preferred range timer embodiment of my invention, the
construction, the stop l1 consists of a short pinv two dials 1I and 'l1 are geared to make one com
40 rigidly anchored in the front frame- plate il and plete revolution every twelye hours and, accord
projecting rearwardly therefrom, and the con
trol member ll is tripped from said stop by press
ingly, in such embodiment, the _scale markings
1l',_1'|' represent twelve hours, with minor sub
ing inwardly on the knob lib, thereby lthrusting
divisions oi' 15 minutes or less. It will be under
the swinging arm and its dog llc inwardly be
45 yond the end of the pin I1, whereby the latter is
cleared andthe control arm ‘Ib can continue
through a third step’of return movement down to
"so
its final position illustrated in Figure _9. In other
possible alternative constructions, the pin l1
might be arranged for the tripping movement.
as by providing a knob on the outer end thereof
and arranging said pin for sliding or rotating
movement, so as to enable the inner end of the
pin to be withdrawn from the path of the dog
55 llc, or so as to enable a notch in said pin. similar
to the notches Ila, "a, to be slid or rotated into
the path of the said dos.
- ` Figures 6 to 9, inclusive illustrate the construc
tion of cam 4l which is used in the rangetimer
embodiment of my invention. from which> it will
be seen that when the control member is in the
stood that in other embodiments the geared rela'
tion of the dials to the time piece may be arranged
for a higher or lower rotative speed, and the dial
markings would then vbe modined accordingly.
Fixedly secured to the outer ends of the reduced
shaft extensions llc and ttc are pointers 1B and
1l' which cooperate with the dials ‘It and 11.
Printed on the face plate 2l adjacent to the rotat
ing dials are two datum marks Il and l2 which
cooperate with the pointers 'Il and ‘Il in indicat- _
ing whenithe automatic tripping operations willl '
occur, i. e., when the two pointers are aligned with
their respective marks lli and l2, the notches lla
and "a are in their tangent positions fontripping
the control member il.
A pin Il is passed through each of the reduced _
shaft extensions "c, tic, and has its ends bear
ing against a washer Il mounted in front of each
position illustrated in _Figure 6, the righthand s dial 1I, 11. This pin and washer arrangement
lobe _lla of the cam is holding- the 'switch con
tacts Il and M separated: when the control ele’
ment is in the position illustrated in Figure 7, the
switch contacts are permitted to engage; when the
control element is in the position illustrated in
Figure 8. the lefthand lobe "b of the cam holds
contacts' separated; and >when the control
70 the
element is in the position illustrated in Figure 9,
the switch contacts are permitted to engage.
The two notched tripping shafts ll and II have
suitable _bearing support in the front and rear
75 frame plates I8; Il.' the notches Ila and “d in
sustains the end thrust of the spring spider ‘Il
tending to thrust each of the gears 1I and 1I
outwardly along its respective shaft.
_
The manual setting of each of the tripping
shafts Il and Il is enacted through separate ad
iusting knobs Il and Il, both located in proximity
to the setting knob lid and conveniently accessi
ble from the front of the housing. These ad
iusting knobs are secured to the outer ends‘of `.
shafts I1 and l), respectively, which have bearing
support in the' front and rear frame plates Il and
II. Secured to the inner portions of these shafts
'said'shsfte lying in 4the plane of theeontrol arm' are spurgears Il and Il, respectively. whichmesh
is'
'
»
,
acecho@
open the switch at the‘expiration of a given
time, she may set only the “Off” dial 'ill for
this time interval and then turn the setting knob
Qld only to the "On” position, with the control
its notch 65a and pointer i8 into any desired an ~member @i latched behind the shaft et. At the
guiar position, the time responsive driving gear expiration of this set time interval, the switch
will automatically open.
f
‘
‘il and the associated dial it meanwhile remain
ing substantially stationary during such adjust
Referring now to the interval timer embodi
ing operation by reason of the friction slippage `ment illustrated in Figures l0, l1 and l2, this
connection it; and adjustment of the other knob embodiment >also has the two rotating tripping
@tl is eñ’ective through gears 92 and Se to adjust shafts t5 and t6, but here these two shafts are
the other tripping shaft S6 to bring its notch @6a permanently geared together in a ñxed gear ratio.
and pointer l@ into any desired angular position, Rigidly secured to shaft 65 is a large spur gear
with spur gears t3 and @t which are rigidly se
cured to the shafts t5 and 58, respectively. 'Eto
tation of the knob et is eiîective through gears
@i and Se to adjust the tripping shaft 65 to bring
the time responsive driving gear ‘l2 and the as
sociated dial il also remaining substantially sta
tionary during this adjusting operation by reason
Yof its friction slippage connection it. '
"
The operation of the above described embodi
ment is as followsz--Assuming that the housewife
desires to havethe particular heating element of
the range go on at three o’clock and to go off at
six o'clock, she turns the knob @5 to rotate the
pointer ‘lâ into registration with the “3” marking
on the "On” dial it, and turns the knob Sti to
rotate the pointer i9 into registration with the “6”
mark on the "Off" dial lvl. With these two time
settings established, she thereupon revolves the
setting knob bld to swing/the control member 5i
to its extreme righthand position, as illustrated
30 in Figure 6. In this position, the switch contacts
33 and tt are open. During the continued rota
tion of the gear ‘li , in response to the operation of
the clock movement, the shaft 55 is carried around
with said gear through the friction clutch con
35 nection it, and when the “3” mark on the dial 'it
and the pointer lâ reach the mark Bi, the notch
@Ea in said shaft is in its tangential position and
thereupon the control element 5i is snapped back
through the first-step of its return movement, into
the position illustrated in Figure 7. in this posi
tion the switch contacts are closed, thereby clos
ing the circuit of the range. Meanwhile, the
shaft t@ has also been rotating with its time re
sponsive driving gear l2, and when the “6” mark
on the dial il, and the pointer ‘li-l, come into sub
stantial registry with the stationary mark t2,
the notch @da of said shaft is in its tangential
position, and thereupon the control member 5l is
permitted to snap through the second step of its
return movement, into the position illustrated in
Figure S. In this position, the switch contacts
are open. This completes the cycle of automati
cally closing and opening the circuit at predeter
mined times. As the control element 5i moves
55 -between each of the positions illustrated in Fig
ures 6, 7 and 8, the indicia “Set”, “0n” and “Off”
on the target disc 52 appear successively in the
sight window @il so that the -housewife can tell
instantly the condition of the time switch.
In the event that she should wish to close the
switch contacts 33, 3d, and have them remain
closedindependently of time, it is only necessary
l -for her to press inwardly on the setting knob
- tid, which serves to thrust the shaft 5ta and
65 arm dit inwardly in opposition to the pressure
of the spring 5t, thereby causing the dog dic to
,clear the inner end of the ñxed stop el, so that
>the control element can swing down through the
last step of its return movement, into the posi
70 tion illustrated in Figure 9, which permits the
switch contacts to close. In this position the
red target area 53 appears in the window 5t, for
indicating that the switch is closed. if the house-l
` wife desires to have the switch closed at once,
75 with the device only functioning to automatically
S5, and rigidly secured to shaft t6 is a small spur
pinion et. The pinion 96 meshes with a relatively
larger gear @l and the latter gear drives a small
pinion @t which meshes with the large spur gear
9d. The intermediate gears Si and 98 are secured
fast to an arbor 99, which is journaled in the
front and back frame'plates i8 and i 9. Fixedly'
secured to the front ends of these shafts 65 and
t@ are the two indicating dials till and HB2. ln
the embodiment illustrated, the above described
gear ratio between said shafts is such that the
shaft 66 revolves 12 revolutions to each revolu 25
tion of the shaft 65. Corresponding to this gear
ratio, the markings ißt' on the dial iti repre
sent- one hour of time divided into five minute
intervals, and the markings E32' on the other dial
m2 represent i'lve minutes of time divided into 30
one minute intervals. This enables the time in
terval to be set forany time up to one hour in
one minute gradations, or even smaller.
It will
be understood that in different embodiments and
uses of the invention, the gear ratio and the time
intervalsmay be otherwise arranged, appropriate
to that embodiment or use.
Motion is transmitted from the clock movement
to the two trippingshafts through a gear i6@
which meshes with a gear itâ mounted on the 40
shaft t6. The latter gear itâ constitutes the time
responsive driving element for the two shafts, the
motion -transnriitted thereto being such as‘to cause
the shaft E5 to rotate once in an hour and to
cause the shaft t@ to rotate once in five minutes, 4:5
as above‘described. A friction slippage clutch
is interposed between the gear ißt and the shaft
65, this clutch connection also consisting of a
spring spider tilt (Fig. 12) similar to the spring
spiders ‘it of the preceding embodiment.v ri‘he 50
ends of the spider arms bear against the back side
of the gear itâ and the hub of the spider bears
against a collar itl on the shaft tt. This fric
tion slippage connection permits the two Vshafts
to be given their manually adjusted settings, but 55
at other times compels these shafts to rotate in
response to the operation of the clock.
Both shaftsare set simultaneously by the ma
nipulation of one adjusting knob il i, which is
secured to a shaft _M2 journaled in the spaced
frame plates. `A gear il@ secured to this shaft
meshes with an idler ,gear itil, which in turn
meshes with the pinion 96, the idler gear being
mounted on a suitable spindle or arbor i i5 jour
naled.- in the frame plates.
'
65
The oscillatory control assembly di is substan
tially the same as that previrmslyv described, with
the exception of the cam ¿35, which has only a
single lobe ¿350. The third stop is also provided
for the control> member, in the form of a pin 70
Si, like that previously described, from which the
control member can be released by pressing in
wardly on~ the knob äid. The dials iti and ißt
are designated “2” and “i”, respectively, on the
face plate of the clock. Corresponding thereto,
5
is given a slight lead of operation over the shaft
“0n-J2", “On-1”, “Off";.followed by the red tar- a 66 so that for any time setting ci' more than iive
minutes, the shaft 65 will be sure to trip ‘the con
- get area |53.
In the operation of this embodiment, it will be trol member before the shaft E8 has arrived in its
assumed that it is desired to close the circuit tripping position. Thus, the ilrst shaft only de
through the contacts 33 and 34 and to have this termines the large gradations of time, and the
circuit open automatically at a predetermined second shaft determines the short gradations ci’
time. Inasmuch as this second shaft 68 has e. ro`-`
time interval later on--say 43 minutes. Prepara
tory thereto, the adjusting knob ||| is turned tative speed twelve times' as high as the first
10 the proper amount to have the “40” mark on the shaft, a much higher degree of accuracy for the
dial |0| iust past the arrowhead marker 8|,.and short gradstlons of time >can be had from this
to have the “3” mark on the dial |02 in register second shaft, thereby avoiding the necessity of
the target disc l2 bears the successive indicia:
with the arrowhead marker 82. The setting knob
extremely accurate machining operations ~and.
5in'. is now rotated in a clockwise direction to
avoiding errors from gear backlash, wear, etc.
15 swing the control arm i||b to its extreme right
With regard to the second of these advantages, it
will be evident that the large scale division of the
the shaft 65. The indicia "On-2" now appears second dial |02 into one minute intervals enables
in the sight window I4, indicating that the time ' the operator conveniently to set the device for
computation is based on the settings of both dials. accurate time gradations over either long or short
20
As shown in Figure 11, this position of the control intervals.
When the control arm is in its “Oil” position, '
member disposes the cam lobe lic out of engage
ment with Vthe movable switch element, with the against 'the stop 81, the “Oii’” indicia on the tar
result that the switch contacts are in engagement get disc appears at the window 5i. Likewise, as
and the circuitwis closed. The dials lili and |02 in the previously described embodiment, when
the operator desires to close the switch for a utili
.25 are rotated in their timed movement in a counter
zation of current independently of time, it is
clockwise direction, back toward their zero posi
tions, and the notches are so related to their only necessary to press inwardly on the setting
dials that when the “O” mark of the dial Ml is knob Bld to cause the control arm to clear the
. hand position, where it becomes latched behind
approximately in register with the arrowhead
'so pointer 8|, the notch “a will be in tripping posi
tion, and, likewise, when the "O" mark on the dial
|02 is in register with this arrowhead pointer 82,
the notch 88m will be in tripping position. It will
therefore be seen that substantially at the expira
tion of 40 minutes or slightly more, the control
member 5| will be tripped through the iirst notch
inner end of the stop pin 6l, whereupon the con
trol member swings downwardly to the limit of its 30
counterclockwise movement, oscillating the cam
lobe Mc out of engagement with the movable
switch element and permitting the switch con
tacts to close. In this position, the red target
area 53 appears in the sight window 54, indicat 35.
ing that the switch is closed.
ßaethereby swinging back intoengagement with
While I have illustrated and described what I
the other shaft B6. This still leaves the switch
regard to be the preferred embodiments of my
contacts closed because the cam lobe has not en
'40 gaged the movable switch element. The latter
invention, nevertheless it will be understood that
such are merely exemplary and that numerous
modincations and rearrangements may be made
therein without departing from the essence of the
g shaft and its dial |l2 have meanwhile been rotat
ing at a speed twelve times that of the shaft 85,
and when the “0” mark on the latter dial comes
into registry with the pointer '82, the notch 86o
45 will arrive in its tangential position, thereby trip
ping the control member and permitting it to
swing down 'into engagement with the nxed stop
Il. This will bring the cam lobe “c into engage
ment with the movable switch element, resulting
in the opening of the 'switch contacts,
Bhould'the operator desire to set the device for
' a short time interval of five minutes or less, this
setting is established on the “1” dial, designated
|02. For example, if only a B-minute interval is
desired, the “,3” on that dial is placed in regis
ter with-the fixed marker 82. Thereupon, the
invention.
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I claim:-
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l. In a time switch, the combination of con
tact apparatus, a control member governing said
contact apparatus, said control member adapted
to be moved from a normal position to a set posi- v
tion, means normally tending to cause a unidi
rectional return motion of said control member 50
from said set position back to said normal posi
tion, tripping stops disposed at different polnts'in
the path of such return movement-"time respon
sive drivingmeans for actuating said tripping
stops to release said control member, frictional 55
motion> transmitting means between s_aid time re
setting knob lid is rotated through only the nrst . sponsive` driving` means and said tripping stops,
step ~ of its setting actuation, sumcient to latch and means for settingsaid tripping stops relative
the control member in engagement with the shaft
ß. At'this time the indicia "On-1" on the target disc appears in the window Il, indicating that
the time setting is based on the indication of the
“1” dial. At the expiration of three minutes,
‘thesero mark on this dial will have returned to
ly to said time responsive driving means.
A .
_ 2. In a time switch, the combination of contact
apparatus, an automatic control member, means
responsive to the motion 'of said control member
for governing said contact apparatus, said control
.member adapted to be moved _from a normal posi
the'nxed marker I2 and the control element will _ tion to a set position, meansv normally tending
to cause a return motion of `'said control member
be tripped for swinging back to its switch open
from said set position back to said normal posi- ‘
ing’ position in engagement with the stop Il.
Attention is vdirected to the fact that vthe use tion, tripping shafts operative to control said re
of two trlppinl shafts' for controlling the open
turn motion. said shafts having notches therein '
70 ing of the switch has a two-fold advantage; first, movable into releasing- positions for- releasing said
it enables greater accuracy to be obtained in the control member, time responsive driving means -
automatic tripping operation, and, second, it en
ables small time intervalsto be more accurately
established in the setting of the device. Refer
ringtotheiirstoftheseadvantageatheshaftil'
for moving said’shafts, and means for'setting said
shafts Arelatively. to said time responsive driving
means.
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_ 3. `In a time switch, the combination of contact
6
accenno -
apparatus, an automatic control member. vmeans
responsive to the motion ci said member for gov
erning said contact apparatus, said control mem
ber adapted to be moved from a normal position
to a set position, means normally tending to cause
a return motion of said control member from said
set position back to said normal position, a plu=`
rality of tripping shafts disposed at diñerent
lo
points in the path of such return movement for
causing such return movement to occur in a plu
rality of steps, said shafts having notches there
in movable into releasing positions for releasing
said control member, time responsive driving
means for said tripping shafts. frictional means
15 for transmitting motion from said driving means
to said shafts. and means for setting said shafts
relatively to said time responsive driving means.
fi. In a time switch. the combination of contact
apparatus. an automatic control member,- means
20 responsive to the motion oi said control member
for governing sáid contact apparatus, said control
member adapted to be moved from a normal posiß
tion to,a set position, means-normally tending to
i cause- a return motionof said control member
25 from said set position baclr to said normal po
sition, a tripping shaft for holding said controly
tact apparatus. said control member adapted to
be moved in one direction to a set position, means
normally tending to cause a unidirectional return
motion of said control member in the opposite
direction back from said set position, a ñrst
stop member governing said return motion, time
responsive means for eñecting' an automatic re
lease~ between said ñrst stop member and said
control- member, means for adjusting the position
of said ñrst stop member relatively to said time
responsive means. a second stop member Vgovern
ing said return motion, and manually actuated
means for enecting a release between said second
stop member and said control member.
8. In a time switch. the combination oi' con
tact apparatus, a control member governing said
contact apparatus, saidcontrol member adapted
to be moved from a normal position >to a set
position, means normally tending to cause a re
position back. to said normal position, a plural
ity of tripping stops disposed at diiïerent points
in the path of such return movement for causing
the return motion to occur in a plurality of steps,
,time responsive driving means for actuating said 25
member in said set position, a second tripping
shaft operative to interrupt the return motion
tripping stops to release said control member,
means for setting said tripping stops in diner
ent tripping positions relatively-to said time re»
of said control -member between said set posi`=
sponsive driving means," anóthen stop member
said return
80 tion and said normal position, said shafts having _ governing
l
notches therein movable into releasing positions
for releasing said control member, time respon=
.sive driving'means for rotating said shafts, frica
tional means for transmitting motion from said
35 time responsive driving means to said shafts. and
manually actuated means'i‘or setting said shafts
in diderent angular positions relatively toA said
so
turn motion of said control member from said set
otion, and manually
actuated means for effetxslëing a -release between
said latter stop ‘member and said control mem
ber.
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9. In a time switch, the combination of con
tact apparatus. a control member governing said 35
contact apparatus. -saidcontrol member being
movable in two diilerent planes, a. time controlled
time responsive driving means.
`
tripping device operative to govern the motion‘oi’
â. In a. time switch, the combination of con- ~ said control member
'one plane, time respon--
tact apparatus,.an oscillatory control member,
\ momiav responsive to the motion of said control
member for governing said contact apparatus,
manually actuated means for oscillating said
sive driving- means for said tripping device, a 40
stop member for governing the motion of said '
ì controlmember, and means for moving said con- `
trol member in the other plane for eñecting re
- control member from a normal position to a set , leasel between said stop member and said con
position, spring means normally tending to cause
e.v return-'motion of said control from said set
position back to said normal.` position, a tripping
shaft operative to hold said control member in
said set position. a second tripping shalt opera-à
50 tive to interrupt said return motionat an intera
. trol member.
is
l0. ln a time switch, the combination oi’ con- '
tact apparatus, a >control member governing said
contact apparatus and movable in two different
planes, said control member adapted to be moved 50
in one plane from a nórmal position to a set
mediate point, said tripping" shafts having
tending'to cause a re
notches therein rotatable into releasing positions position, means norm
for releasing said control member. time respons1 turn motion of' said con l member in said lat- i I»
ter plane from said set position back to said
sive driving means lor said shafts, irictionel normal~
pontion, a ñrst stop member> governing
55 means for transmitting motion from said driving vsaid return motion, time responsive driving 55
means to vsaid shafts, manually actuated means
for -angulen‘ly setting- said tripping shafts rela» means for said nrst stop member adapted to actu
i tively to said time responsive driving means, and ate the latter into releasing position, means for
indicating means for indicating the settings im-= setting said nrst stop member relatively to said
parted to said shafts. -
' l.
t. ln a time switch, the combination ci contact
apparatus. a'control member governing said con»
' tact apparatus, said control member adapted to
^ , be moved in one direction to a set position, means
65 normally tending to cause a return motion or
said controlmember from said set position, a
drst stop member governing said return motion.
>time responsive means for eñecting an automatic
time responsive driving means. a second stopV 60
member governing said return motion, and
means for moving seid controll member in the
other plane for edecting a release >between said
second stop member and said control member.
l1. In a time switch, the combination of con
tact apparatus, a controlmember governing said
contact apparatus comprising a shalt mounted
i'or rotative'and shifting movements. said shaft
adapted to be rotated from a normal position~ to
a set position, means normally tending'to cause
a return rotation of >said shaftv from said set
position'baclr to said normal position, a time 1re
release between said iirst stop member and said
70 control membena second stop member governsV
i ing said return motion, and manually actuated
means for edecting' a release between said second
sponsive tripping device operative to control said
stop member and said control member.
7. ina time switch, the _combination oi contact return rotation. a stop. member for interrupting ,
75 apparatus, a control member governing said con@ said return rotation. andl means :or sliding said
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7
2,050,400
.
ing means operatively connectedto said tripping
lshaft forlireleasing said control lmember from
element for eiîecting~ release of said control mem
ber to close said contact members at apredeter
12. In a time switch, the combination of vcori
tact apparatus, a control member governing .said .mined time, means for presetting said tripping
contact apparatus, said control member adapted element, a second vtripping element disposed 'to
arrest said control member at an intermediate po
to be moved-from a normal position to a set posi
tion, means normally tending to cause a return sition in its return to said normal position there
motion of said control member from said set byr permitting said contact members to remain
position back to said normal position, a series of in engagement as long as said control member
stops -operative to interrupt said return motion at remains in said intermediate position, means for’
operatively interconnecting said timing means
spaced points, time .responsive means for auto
with said second tripping element- for effecting
' matically-eiîecting release between> said control
release of said control member to open said con
member and a plurality of said stops, and manu
tact members at a predetermined time, and
ally responsive means for- manually effecting re
lease between said control member and one of means for presetting saidv second tripping 15
said» stop member.
said stops.
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element.
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17. Ina timel switch, the combination of con
13. In a time switch, the combination of con
tact apparatus, a control member governing said
contact apparatus, said control member adapted
tact apparatus, a control member governing said
contact apparatus, said control Vmember adapted
to be moved from a normal position to a set posi 20
20 to have rotative movement from a normal posi
tion to a set position, means normally tending - tion, means normally tending tov cause areturn
motion of said control member from said set
to cause a return rotation of said control mem
ber from -said set position back to _said normal position back to said normal position, a plurality
of tripping devices operative to control said re
turn motion, time> responsive driving means for 2.5
said tripping devices- including means for driving
said tripping devices- at different speeds, and
means for setting said tripping devices relatively
position, a plurality of -stops operative to -inter
25 rupt said .return rotation at spaced points, time
responsive means for automatically effecting re
_ lease between said control member and one of
said stops, and manually responsive means for
manually effecting release-between said contro
30 member and one of said stops.
,
to said timeV responsive driving means.
~
18. In a time switch, the combination of con
‘
14..I_n a time switch, the combination of con f tact apparatus, a control member governing said
contact apparatus, said“ control member adapted
tact apparatus, control mechanism for said con
tact apparatus comprising a shaft, 'an arm on to be rnoved from a normal positionto a set posi
Vsaid shaft swinging about the axis of ‘said shaft, tion, means normally tending to cause a return
135 a‘plurality of tripping devicesrdisposed substan motion of said control- member from said set
position back to said normal position, a pluralityY
' tially concentrically relatively> to said axis and
of trippingdevices operative to control said re
adapted to have substantially continuous mo
‘tiony during the normal operation of the time ‘ turn motion, time responsive _driving means-for
>said tripping devices including means for driving
'said tripping devices at different speeds, and
switch,va dog movably mounted on said arm and
v4:0 adapted to be latched behind said tripping de
vices when said arm is rotated in one direction,
manually actuated setting„means for.’ rotating
means normally tending to cause rotation of said
one of said tripping devices relatively to said
arm in the opposite direction, rand time respon
sive means for actuating one of »said tripping
time responsive driving means: '
devices.
.
1
19, In a time switch, the combination of con-.
tact apparatus, a control member, said control
member adapted to be moved from a normal
»
15. In a time switch, the combination of con
position to a set position, means normally-tending
to cause. a return motion from said set position
tact apparatus, a rotatable arm, c’am means re
' sponsive to the motion of said arm for governing
said contact apparatus, _a rotatable shaft, a' >`bacl': to said normal position in a direction oppo
latch member-mounted on said arm adapted to
site to movement to said set position, means re
have latching engagement with said shaft when
sponsive to said return motion for causing switch
ing actuation of said Ccontact apparatus at a
.point intermediate the limits of said return mo
v'tion and continuously rotating timeeontrolled re
leasing meansadapted to be engaged by said
. control memberl _and governing said return
. said `arm is swung to one position, and means
normally tending to cause a motion ofsaidarm
in a direction inyopposition 'to said latched en
55 gagement, said _shaft comprising a recessed por
tion operative upon rotating into a predeter-
mined position to release said arm. time respon
motion.
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' -20. In a time switch, the combination of con
sive driving means for said- shaft, ,frictional slip
tact apparatus, a> control member, said control
„page means transmitting motion from said driv
ing means to said shaft, and means for setting member adapted' to be moved from a normal po
said shaft relatively to said time responsive driv ,sition to a set position, means normally tending
t'o‘cau'se a return motion from said set position
ing means.
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“ _' 16.l In a timeswitch f_or electric rangesfand the back to said normal position in a direction oppo
, like, in combination, separable contact membersV ,site` to movement to said set position, means re
to said return motion for causing said
es >`disposed to control the connection of a heating -sponsive
contact apparatus to assume a circuit closing
element of the range to a current source, a con
trol member movable from a normal _position to - condition at one point intermediate the limits of
l* a set position for actuating said contact mem- - said return motion and for causing said contact
, bers from one circuit controlling position to the _
apparatus to' assume a lcircuit opening condition`
70 other,- means for biasing~ saidv arm from said/set . at another point intermediate the limits of said 70
position to said _normal position .in a reverse return motion, and continuously rotating time
direction to that in which it is moved tov said set' controlled releasing means arranged to be _en
position, a first tripping element operative to gaged directly by said control member for gov
' hold said control member in said set- position in
75 which said contact members are separated, tim
I erning said return'motion.
Y
21. In a time switch, the combination of oon
r
_
75
2,056,400
tact apparatus, a'controi membergoverning‘said
contact apparatus, said control member adapted ,.
. to be moved from a normal position to a set
position, means normally tending to cause a-‘re
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.
' driving member to said 'ili‘st‘holding device, mech
anism for mechanicallytransmitting motion i‘rom‘Y
said timeresponsivedriving member to said ~sec-v
0nd holding device, each of> said kholding devices
turn motion of said control member from said 'being actuated into releasing f position by said 5
set position Back to said normal position, a con
tinuously rotating ñrst holding device operative
to control, one part of said return motion, a _con
tinuously rotatingy second holding'device opera
time responsive driving - member, and setting
means for changing the Position of one of said
holding devices >relativelyvto said time respon
sive driving member for adjusting the time when
10 tive to control another part ofsaid .return mo--
said latter holding device is moved into releasing- l0
.
tion, each of saidvholding devices being rotatable position.
into a releasing position, and time responsive
23. In a time switch, the combination offco'n
-means for governing the rotation of said holding . tact apparatus, a control member governing said
.devices into their releasing positions.
» -contact apparatus, said control member adapted -.
22. In a time switch, the combination of con
to be moved from a normal position tol a set l5,
tact apparatus, a control member governing saiclv positlommeans normally tending to cause a uni
Vcontactapparatus', said control _member adapted directional return motion of said control mem
to be moved -from'ay normal position to a set
ber from said set position back to said normal
position, means normally tending to cause a re-. . position, a tripping device operative to control
turn motion of said control member'from said'
set position back to said normal position, a time
responsive rotatable. driving member havingl sub
stantially continuous rotation during the nor
' mai operation of the time switch, a mst holding
device operative to control onev part of the return
.motion of said control member, a second holding
device operative to control another part of said
return Imotion, mechanism for mechanically
transmitting motion from said »time responsive
said return motion, va time responsive driving
device for actuatingsaid tripping device, an in
dicating dial rotating with one of said devices,
a pointer rotating with the other- of said de
vices and cooperating with said dial, and adjust-ing means for changing the setting of said trip- 20 ,
ping device relatively to said time responsive
driving
.'
device.
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FREDERICK C. HOLTZ.
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